HOBO MX2308 Temp/RH/PAR Logger
- Free ground shipping
- Expedited repair and warranty service
- Lifetime technical support
- More
SCHEDULE DEMO- Fast, easy logger setup and download via phone or tablet (up to ~100 ft range)
- PAR sensor delivers research-grade light intensity for both sunlight and indoor grow light conditions
- Automatically calculate VPD for a complete view of greenhouse climate conditions
Overview
Rugged and Bluetooth-enabled, the MX2308 delivers research-grade monitoring of key growing conditions—photosynthetically active radiation (PAR), temperature and relative humidity—all in a single device. Whether you’re growing plants in a commercial greenhouse, managing indoor vertical farms, fine-tuning conditions in hydroponic systems, or conducting agricultural or ecological research, the MX2308 gives you the data you need to optimize conditions for growth, health, and productivity.
Built for simplicity and flexibility, this all-in-one logger integrates with the LI-COR 190R PAR sensor, the industry standard for light measurement that's trusted by researchers worldwide for its precision in measuring photosynthetically active radiation (PAR). This versatile logger is designed to operate reliably across diverse environments, from high-tech vertical farming racks to outdoor experimental plots to support informed decisions around lighting, ventilation, and irrigation without the complexity or high costs of traditional monitoring systems:
Examples of Monitoring Applications for the MX2308 Temp/RH/PAR Logger:
- Growers, Farmers & Producers: Helps optimize growing conditions, improve yield consistency, and reduce disease risk for commercial greenhouse and indoor farming operators and hydroponic/aquaponic growers by monitoring where it matters most.em 1 text.
- Researchers & Educators: Wireless setup and data retrieval enable flexible deployment across experimental sites, with data quality ideal for agricultural researchers, plant scientists, and university programs without the budgetary or logistical barriers typical of research-grade systems.
- Ag Tech & Innovation Teams: Ease of deployment and integration-ready data formats make an ideal sensor platform for prototyping or scaled trials needed for companies innovating in lighting optimization and climate control solutions.
Setup and data retrieval are seamlessly simple—no cables or additional download devices needed using the free HOBOconnect app on your phone or tablet. Effortlessly configure the logger and download data via Bluetooth (up to a 100 ft range), which allows you to deploy in and download data from hard-to-reach spots.
Expand your remote monitoring by adding an MX Data Plan, which allows you to upload data to LI-COR Cloud remote software for further analysis, sharing, and more.
Temperature Sensor
Range: -40 to 65 °C (-40 to 149 °F)
Accuracy: ±0.2 °C (typical) within -40 to 65 °C
Resolution: 0.008°C (.014 °F)
Drift: <0.01°C (0.018°F) per year
Relative Humidity (RH) Sensor
Range: 0 to 100% RH, -40° to 65 °C (-40° to 149 °F); exposure to conditions below -20°C (-4°F) or above 95% RH may temporarily increase the maximum RH sensor error by an additional 1%
Accuracy: ±2.5% from 10% to 90% (typical) to a maximum of ±3.5% including hysteresis at 25°C (77°F); below 10% RH and above 90% RH ±5% typical
Resolution: 0.01% RH
Drift: <1% per year typical
Photosynthetically Active Radiation (PAR) Sensor
Range: 0 to 3,000 μmol/m²/s (full sunlight)
Accuracy: ±5% typical (LI-COR LI-190R factory calibration)
Offset: +/-1 μmo
Resolution: 0.1 μmol/m²/s
Spectral Range: 400–700 nm (PAR waveband)
Linearity: Maximum deviation of 1% up to 3,000umol/m2 /s
Stability: <= 2% change over one year
Temperature Dependence: ±0.15% per ˚C maximum
Cosine Correction: Cosine corrected up to 82˚ angle of incidence
Azimuth: <±1% error over 360˚ at 45˚ elevation
Tilt: No error induced from orientation
Detector: High stability silicon photovoltaic detector (blue enhanced)
Sensor Housing: Weatherproof anodized aluminum case with acrylic diffuser and stainless steel hardware. O-ring seal on the sensor base.
Sensor Size: 2.36 cm diameter x 3.63 cm (095” x 1.43”)
Cable Length: 1.8 m
Calculated Metrics
Accumulated PAR in mol/m², Daily Light Integral (DLI) in mol/m²/day, Vapor Pressure Deficit (VPD) in kPa, and Dew Point (computed from logged data)
Response Time (typical, to 90% of change)
Temperature: Without Solar Radiation Shield: 17 minutes in air moving 1 m/sec; With RS1/M-RSA Solar Radiation Shield: 24 minutes in air moving 1 m/sec
Relative Humidity (RH): Without Solar Radiation Shield: 30 seconds in air moving 1 m/sec; With RS1/M-RSA Solar Radiation Shield: 40 seconds in air moving 1 m/sec
Logger
Operating Range: -40 to 65 °C (-40 to 149 °F)
Radio Power: 0.4mW (-4 dBm)
Transmission Range: Approximately 30.5 m (100 ft) line-of-sight
Wireless Data Standard: Bluetooth Low Energy (Bluetooth Smart)
Logging Rate: 1 second to 18 hours
Logging Modes: Fixed interval (normal, statistics) or burst
Memory Modes: Wrap when full or stop when full
Start Modes: Immediate, push button, date & time, or next interval
Stop Modes: When memory is full, push button, date & time, or after a set logging period
Time Accuracy: ±1 minute per month 0° to 50°C (32° to 122°F)
Battery Type: 2/3 AA 3.6 Volt lithium, user replaceable
Battery Life: 2 years, typical with logging interval of 1 minute and Bluetooth Always On enabled; 5 years, typical with logging interval of 1 minute and Bluetooth Always On disabled. Faster logging intervals and statistics sampling intervals, burst logging, remaining c
Memory: 195,000 measurements, maximum
Full Memory Download Time: Approximately 4-5 minutes; may take longer the further the device is from the logger
Dimensions: Logger housing: 10.8 x 5.08 x 2.24 cm (4.25 x 2.0 x 0.88 in.); LI-190R: 2.36 cm diameter × 3.63 cm (0.93 × 1.43 in.)
Weight: Logger: 149 g (5.26 oz)
Materials: Acetal, silicone gasket, stainless steel screws
Environmental Rating: NEMA 6 and IP67
- Fast, easy logger setup and download via phone or tablet (up to ~100 ft range)
- PAR sensor delivers research-grade light intensity for both sunlight and indoor grow light conditions
- Automatically calculate VPD for a complete view of greenhouse climate conditions
Overview
Rugged and Bluetooth-enabled, the MX2308 delivers research-grade monitoring of key growing conditions—photosynthetically active radiation (PAR), temperature and relative humidity—all in a single device. Whether you’re growing plants in a commercial greenhouse, managing indoor vertical farms, fine-tuning conditions in hydroponic systems, or conducting agricultural or ecological research, the MX2308 gives you the data you need to optimize conditions for growth, health, and productivity.
Built for simplicity and flexibility, this all-in-one logger integrates with the LI-COR 190R PAR sensor, the industry standard for light measurement that's trusted by researchers worldwide for its precision in measuring photosynthetically active radiation (PAR). This versatile logger is designed to operate reliably across diverse environments, from high-tech vertical farming racks to outdoor experimental plots to support informed decisions around lighting, ventilation, and irrigation without the complexity or high costs of traditional monitoring systems:
Examples of Monitoring Applications for the MX2308 Temp/RH/PAR Logger:
- Growers, Farmers & Producers: Helps optimize growing conditions, improve yield consistency, and reduce disease risk for commercial greenhouse and indoor farming operators and hydroponic/aquaponic growers by monitoring where it matters most.em 1 text.
- Researchers & Educators: Wireless setup and data retrieval enable flexible deployment across experimental sites, with data quality ideal for agricultural researchers, plant scientists, and university programs without the budgetary or logistical barriers typical of research-grade systems.
- Ag Tech & Innovation Teams: Ease of deployment and integration-ready data formats make an ideal sensor platform for prototyping or scaled trials needed for companies innovating in lighting optimization and climate control solutions.
Setup and data retrieval are seamlessly simple—no cables or additional download devices needed using the free HOBOconnect app on your phone or tablet. Effortlessly configure the logger and download data via Bluetooth (up to a 100 ft range), which allows you to deploy in and download data from hard-to-reach spots.
Expand your remote monitoring by adding an MX Data Plan, which allows you to upload data to LI-COR Cloud remote software for further analysis, sharing, and more.
Temperature Sensor
Range: -40 to 65 °C (-40 to 149 °F)
Accuracy: ±0.2 °C (typical) within -40 to 65 °C
Resolution: 0.008°C (.014 °F)
Drift: <0.01°C (0.018°F) per year
Relative Humidity (RH) Sensor
Range: 0 to 100% RH, -40° to 65 °C (-40° to 149 °F); exposure to conditions below -20°C (-4°F) or above 95% RH may temporarily increase the maximum RH sensor error by an additional 1%
Accuracy: ±2.5% from 10% to 90% (typical) to a maximum of ±3.5% including hysteresis at 25°C (77°F); below 10% RH and above 90% RH ±5% typical
Resolution: 0.01% RH
Drift: <1% per year typical
Photosynthetically Active Radiation (PAR) Sensor
Range: 0 to 3,000 μmol/m²/s (full sunlight)
Accuracy: ±5% typical (LI-COR LI-190R factory calibration)
Offset: +/-1 μmo
Resolution: 0.1 μmol/m²/s
Spectral Range: 400–700 nm (PAR waveband)
Linearity: Maximum deviation of 1% up to 3,000umol/m2 /s
Stability: <= 2% change over one year
Temperature Dependence: ±0.15% per ˚C maximum
Cosine Correction: Cosine corrected up to 82˚ angle of incidence
Azimuth: <±1% error over 360˚ at 45˚ elevation
Tilt: No error induced from orientation
Detector: High stability silicon photovoltaic detector (blue enhanced)
Sensor Housing: Weatherproof anodized aluminum case with acrylic diffuser and stainless steel hardware. O-ring seal on the sensor base.
Sensor Size: 2.36 cm diameter x 3.63 cm (095” x 1.43”)
Cable Length: 1.8 m
Calculated Metrics
Accumulated PAR in mol/m², Daily Light Integral (DLI) in mol/m²/day, Vapor Pressure Deficit (VPD) in kPa, and Dew Point (computed from logged data)
Response Time (typical, to 90% of change)
Temperature: Without Solar Radiation Shield: 17 minutes in air moving 1 m/sec; With RS1/M-RSA Solar Radiation Shield: 24 minutes in air moving 1 m/sec
Relative Humidity (RH): Without Solar Radiation Shield: 30 seconds in air moving 1 m/sec; With RS1/M-RSA Solar Radiation Shield: 40 seconds in air moving 1 m/sec
Logger
Operating Range: -40 to 65 °C (-40 to 149 °F)
Radio Power: 0.4mW (-4 dBm)
Transmission Range: Approximately 30.5 m (100 ft) line-of-sight
Wireless Data Standard: Bluetooth Low Energy (Bluetooth Smart)
Logging Rate: 1 second to 18 hours
Logging Modes: Fixed interval (normal, statistics) or burst
Memory Modes: Wrap when full or stop when full
Start Modes: Immediate, push button, date & time, or next interval
Stop Modes: When memory is full, push button, date & time, or after a set logging period
Time Accuracy: ±1 minute per month 0° to 50°C (32° to 122°F)
Battery Type: 2/3 AA 3.6 Volt lithium, user replaceable
Battery Life: 2 years, typical with logging interval of 1 minute and Bluetooth Always On enabled; 5 years, typical with logging interval of 1 minute and Bluetooth Always On disabled. Faster logging intervals and statistics sampling intervals, burst logging, remaining c
Memory: 195,000 measurements, maximum
Full Memory Download Time: Approximately 4-5 minutes; may take longer the further the device is from the logger
Dimensions: Logger housing: 10.8 x 5.08 x 2.24 cm (4.25 x 2.0 x 0.88 in.); LI-190R: 2.36 cm diameter × 3.63 cm (0.93 × 1.43 in.)
Weight: Logger: 149 g (5.26 oz)
Materials: Acetal, silicone gasket, stainless steel screws
Environmental Rating: NEMA 6 and IP67
Select Options
Customer Stories
